Lathe-center grinder



2 Sheets--Sheet 1.

(No Model.)

E. E. WOODWARD. LATHE CENTER GRINDER.

Patented 001;. 21, 1890.

(No Model.) Y 2 Sheets-Sheet 2. E. E. WOODWARD. LATHE CENTER GRINDBR.

No. 488,878. Patented 088. 21, 1890.

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UNITED STATES PATENT OFFICE.

ELMER E. VVOODWARD, OF ROOKFORD, ILLINOIS.

LATHE-oI-:NTER GRINDER.

SPECIFICATION forming part of Letters Patent No. 438,876, dated October 21, 1890.

Application led May 23, 1887. Serial No. 239,143. (No model.)

To all whom t may concern:

Be it known that I, ELMER E. WOODWARD, of Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Lathe-Center Grinders, of which the following is a specilication.

The design of this invention is, first, to furnish machinists with a center-grinder of simple construction t-h at can be quickly attached to and detached from a lathe; second,that receives its motive power directly from the lathe speed-pulley or face-plate by being belted thereto; third, that will expeditiously and perfectly true up and point a hardened line-center Without the temper thereof being first drawn. I attain these objects by means of the mechanism illustrated in the accompanying drawings, in Which Figure l represents a diagonal view of my invention attached to a lathe and ready for use. Fig. 2 represents a plan View of the same. Fig. 3 represents a vieW of a transverse vertical section of portions of Fig. 2 through the line xx. Fig. lrepresents a view of a longitudinal vertical section of parts of Fig. 2 through the lines fr Qc. Fig. 5 represents a view of a transverse section of portions of Fig. l through the lines fr? m2. Fig. 6 represents a vie-W of a longitudinal section of parts of Fig. 1 through the lines x3 Similarletters refer to similar parts th rough out the several views.

A A A2 A3 represent, respectively, a bed, carriage, speed-pulley, and line center of a lathe.

B represents the bedpiece of my invention; B, a slot therein.

h represents a bolt having a T-head b and nut b2 for securing the center grinder to the lathe-carriage A.

C represents a carriage having a journalbearing C; C2, a bearing-cap. c c represent oil-cups.

D D represent, respectively, a rack and a combined semi-pinion and handle for adjusting the carriage C and giving it a reciprocating motion.

d represents a shaft; CZ', the driving-pulley thereof; d2 d2, clamping-disks for holding the emery-Wheel d3 in position.

E E represent a combined standard and disk, the former bolted to the bed-piece B, the latter provided with the annular fiange E2.

e e represent a combined socket and disk, the latter having the bolt e2 and annular fiange e3 concentric with the annular flange E2.

e4 represents a bar-nut for drawing the disks E e together.

F F represent combined open sockets. slipported by the rod f, the lower end of the latter being fitted securely into the socket c.

G G represent Shanks forked at their lower ends to receive the idlers H H and axes h h, and projecting upward through the open sockets F F and forming with the latter swivel-joints.

I represents a belt passing from the lathe speed-pulley A2 over the idlers H H and connecting With the driving-pulley cl of the center grinder. i

The socket F can be secured to any desired point along the rod f by means of the screwf2.

By loosening the bar-nut e4 the combined socket and disk e e can be rocked in the plane of the face of the latter and the upper end of the rod f and its attachments elevated or depressed at pleasure.

The combination, with the bed-piece B, of the carriage C, cap C2, shaft d, driving-pulley d', emery-Wheel cl3, combined standard and disk E E', combined socket and disk e e', rod f, combined sockets F F', shanks G G, idlers H H, axes h h, and belt I, substantially as described.

ELMER E. WOODWARD. Witnesses:

JOHN GIBSON, L. L. MORRISON. 

